Test-retest reliability of the Personality Diagnostic Questionnaire: Revised.
We describe the test-retest reliability of the Personality Diagnostic Questionnaire: Revised (PDQ-R), which was developed to assess DSM-III-R personality disorders (PD). Thirty patients, diagnosed clinically with PD, filled out the PDQ-R twice at 1 month intervals after having undergone 8 weeks of treatment leading to moderate resolution of their acute axis-I symptomatology. The chance-corrected agreement was almost perfect for all DSM-III-R PD (kappa coefficients: 0.76-1.00). Dimensional scores for individual PD and the total PDQ-Q score were highly correlated (Pearson's correlation coefficients: 0.62-0.99) and the mean of scores did not significantly differ between test and retest. Based on these results, we propose that highly reliable PD diagnoses are possible, even using a self-report questionnaire, if the axis-I symptomatology of depression and anxiety have moderately subsided. These results clarify controversy over how and when reliable PD diagnoses may be obtained via a self-report questionnaire in a clinical sample.
Uehara
T
T
Department of Psychiatry, Niigata University School of Medicine, Japan.
Sakado
K
K
Sato
T
T
D000293:Adolescent; D000328:Adult; D000368:Aged; D001007:Anxiety / Q000523:psychology; D003863:Depression / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010554:Personality Disorders / Q000523:psychology; D010556:Personality Tests / Q000592:standards*; D011569:Psychiatric Status Rating Scales; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires